Switch show running config interface g048 building

Switch# show running-config interface g0/48
Building configuration...
Current configuration : 154 bytes
interface GigabitEthernet0/48
switchport access vlan 41
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 7 mode active
Switch# show running-config interface port-channel 7
Building configuration...
Current configuration : 92 bytes
interface Port-channel7
switchport trunk encapsulation dot1q
switchport mode trunk

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EtherChannel Load Balancing

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Chapter 3 Summary

A VLAN is a logical grouping of switch ports independent of physical location. Local
VLANs are now recommended over end-to-end VLAN implementations.

A trunk is a Layer 2 point-to-point link between networking devices carry the traffic of
multiple VLANs.

ISL and 802.1Q are the two trunking protocols that can connect two switches.

VTP is used to distribute and synchronize information about VLANs configured throughout
a switched network.

VTP pruning helps to stop flooding of unnecessary traffic on trunk links.

Device communication within the same VLAN can be fine-tuned using pVLANs. A pVLAN
is associated to a primary VLAN, and then mapped to one or several ports. A primary
VLAN can map to one isolated and several community VLANs. pVLANs can span across
several switches using regular 802.1q trunks or pVLAN trunks.

Use EtherChannel by aggregating individual, similar links between switches.
EtherChannel can be dynamically configured between switches using either the Cisco-
proprietary PAgP or the IEEE 802.3ad LACP. EtherChannel load balances traffic over all
the links in the bundle. The method that is chosen directly impacts the efficiency of this
load-balancing mechanism.

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Resources

Catalyst 3560 Switch Command Reference
ware/release/12.2_52_se/command/reference/3560cr.html